In how many years will a sum of money doubles itself at…

In how many years will a sum of money doubles itself at 5% per annum on simple interest?

This problem repeats another one in the library (at most with different numbers), so it's left out of browsing.

AQuA-RAT — Algebra Question Answering with Rationales (Ling et al., DeepMind, 2017) · train #13363